Perez‐Cuevas 1996.

Methods	CBA unit of allocation: family medicine clinics and health centers unit of analysis: episodes of care power calculation: not done baseline measurement: not clear characteristics for studies using second site as control: done blinded assessment of primary outcome: not clear protection against contamination: done reliable primary outcome measure: not clear follow up of professionals: not clear analysis appropriate: no
Participants	119 physicians in 18 primary healthcare clinics in Mexico City, Mexico treating patients of all ages with rhinopharyngitis
Interventions	1. Educational meetings + audit and feedback + participation in peer review 2. No intervention control
Outcomes	Professional practice: Change in rate of prescribing antibiotics Change in rate of prescribing symptomatic medications
Notes	Content of workshop derived from review of current bibliography on rhinopharyngitis
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	D ‐ Not used